John j



(No Model.)

I J. J. SGHILLINGER.

GONGRETE PAVEMENT. No. 247,421. Patented Sept. 20,1881.

N. PETERS Phclu-Lifhognphlr. Wuhinaion. EC.

UNITED STATES PATENT OFFICE.

JOHN J. SGHILLINGER, OF NEW YORK, N. Y.

CONCRETE PAVEMENT.

SPECIFICATION forming part of Letters Patent No. 247,421, datedSeptember 20, 1881.

Application filed May 11, 1881. (No model.)

To all whom it may concern:

Be it known that I, JOHN J. SOHILLINGER, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented new and useful Improvementsin Concrete Pavements,of whichthe following is a specification.

This invention relates to an improvement on the invention described inmy Patent No. 105,599, reissued May 2,187], No. 4,364.

My present invention consists in a concrete pavement composed ofroof-shaped or pyramidal sections formed on the ground.

This invention is illustrated in the accompanying drawings, in which-Figure 1 represents a transverse section of my pavement. Fig. 2 is aperspective view of oneof the roof-shaped blocks. Fig. 3 isa similarview of one of the pyramidal blocks.

Similar letters indicate corresponding parts.

The concrete pavement described in my Reissue Patent N 0. 4,364 consistsof sections which are formed successively by spreading the concretemass, while in a plastic state, on the foundation or bed of thepavement, either in molds or between movable joists of the properthickness, the formation of the second section or block being commencedafter the first section or block has set, so that the edges of theseveral blocks do not adhere to those of the adjoining blocks, and thatwhen the pavement is complete each block or section is allowed to heaveseparately from the effect of frost or to be raised or removedseparately whenever occasion may arise, without injury to the adjacentblocks.

Heretofore the blocks or sections formed in the manner above stated havebeen of uniform thickness throughout, and I have found that such blocks,particularlyif made of 1c rge size, have been liable to crack. Forinstance, if in laying a sidewalk according to the method described inmy reissued patent above named the blocks are made of sufticient lengthto extend from the curb to the building on the innersideof thesidewalk,they areliable to crack in such a manner that they have to berelaid very frequently. This defect I have sought to overcome by mypresent invention by forming roof-shaped blocks A instead of blocks ofuniform thickness throughout.

In forming a sidewalk according to this invention, I prepare the bedB inthe manner shown in Fig. 1, and then I place two joists from thecurbstone O to the building D at a one of its edges is removed asufficient dis- 6o tance to form the second block, and so on.

A roof-shaped block formed in this manner can be made with safety tenfeet long and four feet wide, and it is not liable to crack by theinfluence of frost or otherwise.

Instead of making the block roof-shaped, as shownin Figs. 1 and 2,theycan be made pyramidal, as shown in Fig. 3. The concrete which I useby preference in forming my blocks consists of cement, sand, and gravel,which are 0 mixed together with water in suitable proportion to form aplastic mass.

My blocks have also the great advantage that the same, when placed on anincline, are

not liable to become displaced by the action of 7 5 gravity.

What I claim as new, and desire to secure by Letters Patent, is-

A concrete pavement laid in detached sections directly upon the groundor bed, and each section formed of plastic material into a roofshape orpyramidal outline, which rests throughout its breadth on the ground orbed, substantially as shown and described.

In testimony whereofI have hereunto set my hand and seal in the presenceof two subscribing witnesses.

JOHN J. SOHILLINGER.

Witnesses:

' W. HAUFF,

E. F. KASTENHUBER.

